Bedienungsanleitung
Betonprüfhammer
Concrete Test Hammer
Scléromètre à béton
Operating Instructions
N/NR - L/LR
Mode d’emploi
N/L
NR/LR
Proceq SA
Ringstrasse 2
CH-8603 Schwerzenbach
Switzerland
Tel.:
Fax:
E-Mail:
Internet:
+ 41 (0)43 355 38 00
+ 41 (0)43 355 38 12
[email protected]
www.proceq.com
Technische Änderungen vorbehalten
Subject to change
Modifications techniques réservées
Copyright © 2006 by Proceq SA 820 310 01D/E/F ver 09 2006
Contents
Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . General Information . . . . . . . . . . . . . . . . . . . . . . Liability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Safety Regulations . . . . . . . . . . . . . . . . . . . . . . . Standards and Regulations Applied . . . . . . . . . . 2
Measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Measuring Principle . . . . . . . . . . . . . . . . . . . . . . . 4
Measuring Procedure . . . . . . . . . . . . . . . . . . . . . 4
Outputting and Evaluating Data . . . . . . . . . . . . . 5
Conversion Curves . . . . . . . . . . . . . . . . . . . . . . . 6
Factors Affecting the Values . . . . . . . . . . . . . . . . 11
3
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Performance Check . . . . . . . . . . . . . . . . . . . . . . 15
Cleaning After Use . . . . . . . . . . . . . . . . . . . . . . . 15
Fitting a New Recording Paper Roll . . . . . . . . . . 15
Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Maintenance Procedure . . . . . . . . . . . . . . . . . . . 16
© 2006 Proceq SA
2
2
2
3
3
4
Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Form of Delivery . . . . . . . . . . . . . . . . . . . . . . . . . 19
Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Technical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
English
1
For more information, please refer to the Info-Sheet
2003 09 45 BPH-2 EURO-Anvil
Contents
1
1
Safety
1.1
General Information
1.1.1 Basic Information
The concrete test hammer is designed according to
state-of-the-art technology and the recognized safety
regulations. Please read through these operating instructions carefully before initial startup. They contain
important information about safety, use and maintenance
of the concrete test hammer.
1.1.2 Designated Use
The concrete test hammer is a mechanical device used
for performing rapid, non-destructive quality testing on
materials in accordance with the customer's specifications; in most cases, however, the material involved is
concrete.
The device is to be used exclusively on the surfaces to
be tested and on the testing anvil.
1.2
Liability
Our "General Terms and Conditions of Sale and
Delivery" apply in all cases. Warranty and liability claims
arising from personal injury and damage to property
cannot be upheld if they are due to one or more of the
following causes:
2
Safety
- Failure to use the concrete test hammer in accordance
with its designated use
- Incorrect performance check, operation and mainte nance of the concrete test hammer
- Failure to adhere to the sections of the operating
instructions dealing with the performance check, ope ration and maintenance of the concrete test hammer
- Unauthorized structural modifications to the concrete
test hammer
- Serious damage resulting from the effects of foreign
bodies, accidents, vandalism and force majeure
1.3
Safety Regulations
1.3.1 General Information
- Perform the prescribed maintenance work on schedule
- Carry out a performance check once the maintenance
work has been completed.
- Handle and dispose of lubricants and cleaning agents
responsibly.
1.3.2 Unauthorized Operators
The concrete test hammer is not allowed to be operated
by children and anyone under the influence of alcohol,
drugs or pharmaceutical preparations.
Anyone who is not familiar with the operating instructions
must be supervised when using the concrete test hammer.
© 2006 Proceq SA
1.3.3 Safety Icons
The following icons are used in conjunction with all
important safety notes in these operating instructions.
1.4
- ENV 206 Europe
Warning!
This note warns you about the risk of material
damage, financial loss and legal penalties (e.g. loss of warranty rights, liability cases, etc.).
This denotes important information.
© 2006 Proceq SA
- ISO/DIS 8045 International
- EN 12 504-2 Europe
- BS 1881, part 202 Great Britain
- DIN 1048, part 2 Germany
English
Danger!
This note indicates a risk of serious or fatal injury in the event that certain rules of behavior are disregarded.
Standards and Regulations Applied
- ASTM C 805 USA
- ASTM D 5873 ( Rock ) USA
- NFP 18-417 France
- B 15-225 Belgium
- JGJ/ T 23-2001 China
- JJG 817-1993 China
Safety
3
2
Measurement
2.1
Measuring Principle
The device measures the rebound value R. There is a
specific relationship between this value and the hardness
and strength of the concrete.
The following factors must be taken into account when
ascertaining rebound values R:
- Impact direction: horizontal, vertically upwards or
downwards
- Age of the concrete
- Size and shape of the comparison sample ( cube,
cylinder )
Models N and NR can be used for testing:
- Concrete items 100 mm or more in thickness
- Concrete with a maximum particle size ≤ 32 mm
Models L and LR can be used for testing:
- Items with small dimensions ( e.g. thin - walled items
with a thickness from 50 to 100 mm )
If necessary, clamp the items to be tested prior to measurement in order to prevent the material deflecting.
- Items made from artificial stone which are sensitive to
impacts
4
Preferably perform measurements at temperatures between 10°C and 50°C only.
Measurement
2.2
Measuring Procedure
The items ( in brackets ) are illustrated in Fig. 2.4 on
page 5. Perform a few test impacts with the concrete
test hammer on a smooth, hard surface before taking
any measurements which you are going to evaluate.
• Use the grindstone to
smoothen the test surface.
Fig. 2.1 Preparing the test surface
Warning!
The impact plunger (1) generates a recoil when it deploys. Always hold the concrete test hammer in both hands!
• Position the concrete test
hammer perpendicular to the
test surface.
• Deploy the impact plunger
(1) by pushing the concrete
test hammer towards the test
surface until the push-button
springs out.
Fig. 2.2
Deploying the impact plunger (1) (model NR)
© 2006 Proceq SA
Danger!
Always hold the concrete test hammer in both hands, perpendicular to the test surface, before you trigger the impact!
Each test surface should be tested with at least
8 to 10 impacts.
The individual impact points must be spaced at
least 20 mm apart.
• Position the concrete test
hammer perpendicular to
and against the test surface.
Push the concrete test ham mer against the test surface
at moderate speed until the
impact is triggered.
Fig 2.3
Performing the test (illustration shows model NR)
• If you are using models N and L, press the push-button
(6) to lock the impact plunger (1) after every impact.
Then read off and note down the rebound value R indicated by the pointer (4) on the scale (19).
• If you are using models NR and LR, the rebound value
R is automatically printed on the recording paper. It is
only necessary to lock the impact plunger (1) using the
push button (6) after the last impact.
© 2006 Proceq SA
4
19
1
6
Fig. 2.4
2.3
English
Reading the test result from the scale (19) on models N and L
Outputting and Evaluating Data
2.3.1 Output
Models N and L
After every impact, the rebound value R is displayed
by the pointer (4) on the scale (19) of the device.
Models NR and LR
The rebound value R is automatically registered on the
recording paper.
It is possible to record about 4000 test impacts on each
roll.
2.3.2 Evaluation
Take the average of the 8 - 10 rebound values R which
you have measured.
Do not include values which are too high or
too low (the lowest and highest values) in your calculation of the average value.
Measurement
5
• Determine which conversion curve is appropriate for
the selected body shape (see Fig. 2.5 to Fig. 2.10,
page 7 to page 9). Then, using the average rebound
value Rm and the selected conversion curve, read off
the average compressive strength.
Note the impact direction!
The average compressive strength is subject to a dispersion (±4.5 N/mm2 to ±8 N/mm2).
2.3.3 Median Value
In chapter 7 of the Standard EN 12504-2:2001 "Test
Results", the median value is specified instead of the
classic mean value.
When applying this method, all measured values must
be considered (no outliers allowed).
The median value must be determined as follows:
• The measured values are placed in a row according to
the size.
• For an odd number of impacts, the value placed in
the middle of the row, is to be taken as the median
value.
• For an even number of impacts, the mean value of the
two values, placed in the middle of the row, is the
median value.
• If more than 20% of the values are spaced more than
6 units apart, the measuring series must be rejected
as mentioned in the standard.
6
Measurement
2.4
Conversion Curves
2.4.1 Derivation of the Conversion Curves
The conversion curves (Fig. 2.5 to Fig. 2.10) for the concrete test hammer are based on measurements taken
on very many sample cubes. The rebound values R of
the sample cubes were measured using the concrete
test hammer. Then the compressive strength was ascertained on a pressure testing machine. In each test, at
least 10 test hammer impacts were performed on one
side of the test cube which was lightly clamped in the
press.
2.4.2 Validity of the Conversion Curves
- Standard concrete made from Portland or blast furnace
slag cement with sand gravel ( maximum particle size
dia. ≤ 32 mm )
- Smooth, dry surface
- Age: 14 - 56 days
Empirical values:
The conversion curve is practically independent of the:
- Cement content of the concrete,
- Particle gradation,
- Diameter of the largest particle in the fine gravel
mixture, providing the diameter of the maximum
particle is ≤ 32 mm,
- Water / cement ratio
© 2006 Proceq SA
Conversion Curves, Concrete Test Hammer Model L/L R
Concrete pressure resistance of a cylinder after 14 - 56 days
English
Conversion Curves, Concrete Test Hammer Model N/NR
Concrete pressure resistance of a cylinder after 14 - 56 days
Rebound value R
Rebound value R
Fig. 2.5
Model N/NR: Conversion curves based on the average compressive strength of a cylinder and the rebound value R
fckcyl.m: Average pressure resistance of a cylinder
(probable value)
The concrete test hammers shown in Fig. 2.5 and Fig. 2.6 indicate the impact direction.
© 2006 Proceq SA
Fig. 2.6
Model L/LR: Conversion curves based on the average pressure resistance of a cylinder and the rebound value R
Limits of
fckcyl.: Dispersion
The max. and min. values are set so 80% of
all test results are included.
For higher compressive strength refer to special
conversion curves (see www.proceq.com)
Measurement
7
Conversion Curves, Concrete Test Hammer Model L/LR
Concrete pressure resistance of a cube after 14 - 56 days
Fig.2.7
Model N/NR: Conversion curves based on the average compressive strength of a cube and the rebound value R
fckcubem:Average pressure resistance of a cube
(probable value)
8
The concrete test hammers shown in Fig. 2.7 and Fig. 2.8 indicate the impact direction.
Measurement
Dispersion [kg/cm2]
Dispersion [kg/cm2]
Conversion Curves, Concrete Test Hammer Model N/NR
Concrete pressure resistance of a cube after 14 - 56 days
Fig. 2.8
Model L/LR: Conversion curves based on the average compressive strength of a cube and the rebound value R
Limits of Dispersion
fckcube : The max. and min. values are set so 80% of all
test results are included.
© 2006 Proceq SA
Fig. 2.9
Model N/NR: Conversion curves based on the average compressive strength of a cylinder and the rebound value R
fckcyl.m: Average pressure resistance of a cylinder
(probable value)
The concrete test hammers shown in Fig. 2.9 and Fig. 2.10 indicate the impact direction.
© 2006 Proceq SA
Dispersion [psi]
Fig. 2.10 Model L/LR: Conversion curves based on the average compressive strength of a cylinder and the rebound value R
Limits of Dispersion
fckcube : The max. and min. values are set so 80% of
all test results are included.
Measurement
9
English
Conversion Curves, Concrete Test Hammer Model L/LR
Concrete pressure resistance of a cylinder after 14 - 56 days
Dispersion [psi]
Conversion Curves, Concrete Test Hammer Model N/NR
Concrete pressure resistance of a cylinder after 14 - 56 days
for concrete with Portland cement
(similar to curve B-Proceq)
for early strength concrete made
from Portland cement
for concrete made from blast
Furnace cement
is the mean curve of curves 6, 7 and 8
nb: In Japan, only the curve "Average" is used.
We recommend using the individual curves if the
respective concrete quality is known.
The four curves are shown in Fig. 2.7 together with the
B-Proceq curve.
The curves are valid for horizontal impacts and for the
conversion to a compressive strength in N/mm2 evaluated with concrete cubes 150/150/150 mm. For other
impact directions and sample size and shape, the
respective factors must be considered additionally.
For the user of the conversion curves, each "Japan"
curve is individually shown together with the B-Proceq
curve in Fig. 2.8 to 2.10
10
Measurement
fc in N/mm2 (cube 150/150/150 mm)
Portland Cement J
Early Strength J
Blast Furnace J
Average Curve J
60
50
40
B-Proceq
Portland Cement
Early Strength
Blast Furnace
Average Curve
30
20
10
20
Fig 2.7
25
30
35
40
Rebound Value R
45
50
All J-Curves with the Proceq-B-Curve
60
fc in N/mm2 (cube 150/150/150 mm)
2.4.3 Additional Conversion Curves
In addition to the two well known curves from Proceq SA,
we provide you four new curves developed in Japan that
were based on exhaustive tests.
50
40
B-Proceq
Portland Cement
30
20
10
20
Fig. 2.8
25
30
35
40
Rebound Value R
45
50
J-Curve "Portland Zement"
© 2006 Proceq SA
2.5
50
40
B-Proceq
Early Strength
30
20
10
20
25
30
35
40
Rebound Value R
45
Fig. 2.9 J-Curve "Early Strength"
fc in N/mm2 (cube 150/150/150 mm)
50
40
B-Proceq
Blast Furnace
30
20
20
25
30
35
40
Rebound Value R
Fig 2.10 J-Curve "Blast Furnace"
© 2006 Proceq SA
2.5.2 Shape coeficient
The compressive strength measured in a pressure testing
machine depends on the shape and size of the sample.
The samples prescribed for use in the particular country must be taken into account when converting the rebound value R into compressive strength.
In the conversion curves on page 7 to page 11, the
values for compressive strength are specified for cylinders (Ø 150 x 300 or Ø 6" x 12") and for cubes (length of
side 15 cm). The following shape coefficients are familiar
from the literature:
60
10
2.5.1 Direction of Impact
The measured rebound value R is dependent on the
impact direction.
50
Factors Affecting the Values
45
50
Cube
Shape
coeficient
150 mm
1.00
1.25
200 mm
0.95
1.19
300 mm
0.85
1.06
Cylinder
Shape
coeficient
Ø 150x300 mm Ø 100x200 mm Ø 200x200 mm
Ø 6“x12“
0.80
0.85
0.95
1.00
1.06
1.19
Drill core
Shape
coeficient
Ø 50x56 mm
1.04
1.30
Ø 100x100 mm Ø 150x150 mm
1.02
1.00
1.28
1.25
Measurement
11
English
fc in N/mm2 (cube 150/150/150 mm)
60
Example:
A cube with a side length of 200 mm is used for the
determination of the compressive strength with the pressure testing machine.
In this case the strength values shown in the conversion
curves in Fig. 2.9 and Fig. 2.10 on page 9 (for cylinders Ø
6"x12") must be multiplied by the shape coefficient of 1.19.
2.5.3 Time Coefficient
The age of the concrete and its carbonate penetration
depth can significantly increase the measured rebound
values R. It is possible to obtain accurate values for the
effective strength by removing the hard, carbonateimpregnated surface layer using a manual grinding
machine over a surface area of about Ø 120 mm and performing the measurement on the non-carbonateimpregnated concrete. The time coefficient, i.e. the
amount of the increased rebound values R, can be
obtained by taking additional measurements on the
carbonate-impregnated surface.
Rm carb.
Rm carb.
Time coeff. Zf =
⇒ Rm n.c. =
Rm n.c.
Zf
Rm carb.:
Rm n.c.:
12
Another possibility to consider the carbonation depth is
given by the chinese standard JGJ/T 23-2001.
In Table A of the standard JGJ/T 23-2001, compressive
strengths for rebound values from 20 to 60 (in steps of
0.2 R) and for carbonation depths from 0 to 6 mm (in
steps of 0.5 mm) are shown. For carbonation depths
higher than 6 mm, the values for 6 mm apply (no further
changes). The values in the table are based on comprehensive tests performed on concrete of different places
of origin and of different ages.
Based on Table A, Proceq has developed reduction
curves as a function of rebound value and carbonation
depth. These factors can now be applied to the Proceqcurves and the curves of chapter 2.4.3.
Rebound values may be reduced by up to 40%.
The curves shown in Fig. 2.11, are exclusively valid for
the ORIGINAL SCHMIDT and DIGI SCHMIDT concrete
test hammers from Proceq SA.
Average rebound value R, measured on
carbonate-impregnated concrete surface
Average rebound value R, measured on noncarbonate-impregnated concrete surface
Measurement
© 2006 Proceq SA
Carbonation Depth (in mm)
0.0
1.0
2.0
3.0
4.0
5.0
6.0
English
100
Reduced R-Value (in %)
90
23 - 28
28 - 34
34 - 39
39 - 45
45 - 50
80
70
60
Fig. 2.11 Reduction of Rebound values due to Carbonation
© 2006 Proceq SA
Measurement
13
2.5.4 Special Cases
Experience has shown that deviations from the normal conversion curves occur under the following circumstances:
- Artificial stone products with an unusual concrete composition and small dimensions. It is recommended that
a separate series of tests should be performed for each
product in order to determine the relationship between
the rebound value R and the compressive strength.
- Aggregates made from low strength, lightweight or cleavable stone (e.g. pumice, brick rubble, gneiss) result in a
strength value lower than shown on the conversion curve.
- Gravel with extremely smooth, polished surfaces and
a spherical shape results in values for compressive
strength which are lower than those ascertained by the
rebound measurements.
- A strong, dry mixed concrete (i.e. with low sand content)
which has not been placed adequately processed may
contain lumps of gravel which are not visible from the
surface. These affect the strength of the concrete without however influencing the rebound values R.
- The concrete test hammer gives inadequate rebound
values R on concrete from which the form has just been
removed, which is wet or which has hardened under
water. The concrete must be dried before the test.
- Very high values for compressive strength (> 70 N/mm2)
can be achieved by adding pulverized fuel ash or silica fume. However, these strengths cannot reliably be
ascertained using the rebound value R measured by the
concrete test hammer.
14
Measurement
2.5.5 Conversion Curves for Special Cases
The recommended course in special cases is to prepare
a separate conversion curve.
• Clamp the sample in a pressure testing machine and
apply a preload of about 40 kN vertically to the direction in which the concrete had been poured in.
• Measure the rebound hardness by applying as many
test impacts as possible to the sides.
The only way to achieve a meaningful result is to measure the rebound values R and the compressive
strength of several samples.
Concrete is a very inhomogeneous material.
Samples made from the same batch of con-
crete and stored together can reveal discre-
pancies of ±15% when tested in the pressure testing machine.
• Discard the lowest and highest values and calculate
the average Rm.
• Determine the compressive strength of the sample
using the pressure testing machine and ascertain the
average value fckm.
The pair of values Rm / fckm applies to a certain range
of the measured rebound value R.
It is necessary to test samples of differing qualities and / or
ages in order to prepare a new conversion curve for the
entire range of rebound values from R = 20 to R = 55.
• Determine the curve with the pairs of values Rm / fckm
(e.g. EXCEL in the RGP function).
© 2006 Proceq SA
Maintenance
3.2
Cleaning After Use
3.1
Performance Check
Warning!
Never immerse the device in water or wash it under a running tap! Do not use either abrasives or solvents for cleaning!
If possible, carry out the performance check every time
before you use the device, however at least every 1000
impacts or every 3 months.
• Place the testing anvil on a
hard, smooth surface
( e.g. stone floor ).
• Clean the contact surfaces
of the anvil and the impact
plunger.
• Perform about 10 impacts
with the concrete test ham mer and check the result
against the calibration value
specified on the testing anvil.
3.3
Fitting a New Recording Paper Roll
The following instructions only apply to models NR and LR!
Fig. 3.1
Performance check of the concrete test hammer ( model N/L shown )
Proceed as described in "Maintenance Procedure" on page 16 if the values are not within the tolerance range specified on the testing anvil.
© 2006 Proceq SA
• Deploy the impact plunger (1) as described in Fig. 3.2
"Measuring Procedure", on page 4.
• Wipe the impact plunger (1) and housing (3) using a
clean cloth.
31
33
Fig. 3.2
Fitting a new recording paper roll
Maintenance
32
15
English
3
• Turn knurled screw (33) to rewind the recording paper
from reel (31) to reel (32).
• Pull out the knurled screw (33) until it locks and then
remove the reel (32).
• Insert a new roll with the text "Value 100" on the side
closest to the knurled screw (33).
• If the knurled screw (33) does not engage, turn the reel
(32) until the knurled screw (33) starts turning with it as
well.
• Cut off the start of the paper strip like an arrow and
insert it into the slot in reel (31).
• Tension the paper by turning the reel (31).
3.4
Maintenance Procedure
We recommend that the concrete test hammer should
be checked for wear after 2 years at most and be
cleaned. Do this as described below.
16
3.5.1
Stripping Down
Warning!
Never strip down, adjust or clean the pointer and pointer rod (4) (see Fig. 3.3, page 18), otherwise the pointer friction may change.
Special tools would be required to readjust it.
• Position the concrete test hammer perpendicular to the
surface.
Storage
Prior to the storage of the hammer in the original case
release the impact as during a measurement and fix the
plunger (1) with the push-button (6). Secure the pushbutton additionally with a strong adhesive tape.
3.5
The items (in brackets) are illustrated in Fig. 3.3,
"Lengthways section through the concrete test hammer"
on page 18.
The concrete test hammer can either be sent to a service center authorized by the vendor or
else it can be maintained by the operator according to the following description.
Maintenance
Danger!
The impact plunger (1) generates a recoil when it deploys. Therefore always hold the concrete test hammer with both hands! Always direct the impact plunger (1) against a hard surface!
• Deploy the impact plunger (1) by pushing the concrete
test hammer towards the surface until the pushbutton
(6) springs out.
• Unscrew the cap (9) and remove the two-part ring (10).
• Unscrew the cover (11) and remove the compression
spring (12).
• Press the pawl (13) and pull the system vertically up
and out of the housing (3).
© 2006 Proceq SA
• Insert the retaining spring (15) into the hole in the
impact plunger (1).
• Slide the hammer guide bar (7) into the hole in the
impact plunger (1) and push it further in until noticeable
resistance is encountered.
3.5.2 Cleaning
• Immerse all parts except for the housing (3) in kerosene and clean them using a brush.
• Use a round brush ( copper bristles ) to clean the hole
in the impact plunger (1) and in the hammer mass (14)
thoroughly.
• Let the fluid drip off the parts and then rub them dry
with a clean, dry cloth.
• Use a clean, dry cloth to clean the inside and outside
of the housing (3).
3.5.3 Assembly
• Before assembling the hammer guide bar (7), lubricate
it slightly with a low viscosity oil ( one or two drops is
ample; viscosity ISO 22, e.g. Shell Tellus Oil 22 ).
• Insert a new felt ring (18) into the cap (9).
• Apply a small amount of grease to the screw head of
the screw (20).
• Slide the hammer guide bar (7) through the hammer
mass (14).
© 2006 Proceq SA
Prior to and during installation of the system in the housing (3), make sure that the ham-
mer (14) does not get held by the pawl (13).
Hint: For this purpose press pawl (13) briefly.
• Install the system vertically downwards in the
housing (3).
• Insert the compression spring (12) and screw the rear
cover (11) into the housing (3).
• Insert the two - part ring (10) into the groove in the
sleeve (17) and screw on the cap (9).
• Carry out a performance check.
Send in the device for repair if the mainte-
nance you perform does not result in correct function and achievement of the calibration values specified on the testing anvil.
Maintenance
17
English
• Lightly strike the impact plunger (1) with the hammer
mass (14) to release the impact plunger (1) from the
hammer guide bar (7). The retaining spring (15) comes
free.
• Pull the hammer mass (14) off the hammer guide bar
together with the impact spring (16) and sleeve (17).
• Remove the felt ring (18) from the cap (9).
3.5.4
Concrete Test Hammer Model N/L
Key:
1 Impact Plunger
2 Test surface
3 Housing
4 Rider with guide rod
5 Not used
6 Push-button, complete
7 Hammer guide bar
8 Guide disk
9 Cap
10 Two-part ring
11 Rear Cover
12 Compression spring
13 Pawl
14 Hammer mass: 14.1 model N, 14.2 model L
15 Retaining spring
16 Impact spring
17 Guide sleeve
18 Felt washer
19 Plexiglas window
20 Trip screw
21 Lock nut
22 Pin
23 Pawl spring
Fig. 3.3
18
Lengthways section through the concrete test hammer
Maintenance
© 2006 Proceq SA
Data
4.1
Form of Delivery
Concrete test hammer
Model N
Model NR
Model L
Model LR
Article-no.
310 01 000
310 02 000
310 03 000
310 04 000
Total weight
1.7 kg
2.6 kg
1.4 kg
2.4 kg
Carrying case, W x H x D
325 x 125 x 140 mm
325 x 295 x 105 mm
325 x 125 x 140 mm
325 x 295 x 105 mm
Grindstone
1 pce.
1 pce.
1 pce.
1 pce.
3 rolls
–
3 rolls
Model L
Model LR
Recording paper
4.2
–
English
4
Accessories
Concrete test hammer
Model N
Model NR
Accessory article number
Testing anvil
310 09 000
310 09 000
310 09 000
310 09 000
Recording paper, pack of 5 rolls
–
310 99 072
–
310 99 072
Model NR
Model L
4.3
Tecnical Data
Concrete test hammer
Impact energy
Measuring range
© 2006 Proceq SA
Model N
Model LR
2.207 Nm
0.735 Nm
10 bis 70 N/mm2 compressive strength
10 bis 70 N/mm2 compressive strength
Data
19